Table 4. Methodological overview of comparison-specific characteristics obtained from of identified case-control studies.

^*Mendes et al. (2012) was excluded because patients were matched in terms of the final ABO OGS score.

CB, Conventional brackets; DI, discrepancy index; Ex, extraction treatment; Non-Ex, nonextraction treatment; RCT, randomized clinical trial; MBT, McLaughlin–Bennett–Trevisi; SE, standard edgewise; ABO, American Board of Orthodontics; OGS, Objective Grading System.